rikhar Loc: Ct. shoreline

Thank, You to ALL who took the time to answer. Some gave the answer that I myself thought was correct but was not sure of until I got it from you more experienced than I, photographers. Special thanks to you. Now I know for sure that the sensor size is the determining factor on the ANGLE OF VIEW and that the DX/FX designation on the lens is of no consequence in this particular situation. To the rest who answered, you mostly confused me more than I was. I thought my question was clear but it might have been confusing to you because of my wording. If that is the case, I apologize. As someone said it gives me a headache Please excuse me now, I have to go get some aspirin and take a nap
Rick

robertjerl Loc: Corona, California

How's retirement going?

After 12 years of it I got bored and yesterday started teaching a basic photography course at the Senior Citizens Center photo club. But I had planned on doing my lesson plans last week, so I got sick. But the six people who showed up for the class enjoyed the pictures shown by the regular members, a regular member stayed for the class and helped with the class and it turned into a nice conversation about cameras and basic photography like a seminar class and the conclusion was "This was fun." I did get people's preferences for days and times so on Monday when the center manager is there I can schedule weekly classes for my 3x2 hour short course and then decide on more advanced subjects - two ladies perked up when I explained what "Macro photography" was, seems they both grow potted plants of the exotic types that need to coddled, talked to, petted on their little heads and sing lullabies to for all I know and they want to do really close up pictures of their little babies. The two retired couples are both planning long vacations in late Spring (Africa and Europe) and they perked up at the mention of landscape and travel photography as a future subject.

ecurb Loc: Metro Chicago Area

When I shot architectural work with an 8x10 camera, the extreme wide angle lens was a 165mm SuperAngulon. Depth of field was never an issue but I shot at f22 or smaller. There was no image compression as it was not a long lens.

Bill_de Loc: US

Bill Murray was right, "IT JUST DOESN'T MATTER!"

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billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

fosis Loc: Pittsburgh, PA

I'd say no, because the diameter of the lens determines the maximum light that flows through it, and a 50mm f:2 lens is 25mm across, regardless of the size of the chip behind it.

So f:4 with that lens has 1/2 the diameter of the lens, which equals 1/4 the area for light to pass through, in other words, that's two full f:stops. That's why one f:stop number smaller equals the old stop x the square root of 2 (1.4).

Now there are optical refinements that are being used at the rear of the lenses, as the new 4/3rds format permits the distance from lens to sensor to be reduced, but I'm not aware that they modify the basic rule that I started with, above.

BebuLamar

What is it? The angle of view of the 150mm lens can be as wide as 94 degrees on an 8x10 camera to a very narrow 6.11 degrees on a 1" sensor camera. Saying angle of view of the 150mm lens means nothing.

SteveR Loc: Michigan

To answer your question succinctly, it's the sensor.

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

Sorry, just trying to help. I am a photographer, not a mathematician. I deal in light and what it does to a photograph, not degrees and angles and sensor size. Again, I am just a photographer looking for my best results, just trying to help. All this stuff is really meaningless to me. From now on I will leave the math to you guys. All I care about are results.
Like this.

DeanS Loc: Capital City area of North Carolina

This topic is so over-hyped. Forget all this hashing about angle of view and crop this and fx that. Put any lens on your camera, preferably ff lens on ff body or crop lens on crop body, look through the vf, and if you like what you see, push the button. If not, five options:
Zoom in
Zoom out
Get closer
Move farther away
Change lens

Couldn’t be easier.

nadelewitz Loc: Ithaca NY

Yes, you are wrong.

Angle of view is a LENS property. AOV of a given focal length lens DOES NOT CHANGE, EVER!. A lens' focal length DOES NOT CHANGE moving it from a DX body to an FX body.

WHAT DOES CHANGE is that on a DX body, some of what the lens sees is CROPPED, meaning some of what it sees falls outside the crop sensor. So the sensor records what a longer length lens on a full-frame body would record.

bleirer

This is where the terminology starts to get muddied. I believe what you are talking about is called angle of coverage. Field of view/angle of view varies with both the size of the sensor and the focal length. Here is a good explanation.

https://photo.stackexchange.com/questions/5917/what-is-angle-of-view-in-photography

Calculator, try different size sensors with the same focal length https://www.pointsinfocus.com/tools/depth-of-field-and-equivalent-lens-calculator/#{%22c%22:[{%22f%22:10,%22av%22:%228%22,%22fl%22:50,%22d%22:3048,%22cm%22:%220%22}],%22m%22:0}

Bill_de Loc: US

Simplicity at its best.

Angle of view (in degrees) = 2 ArcTan( sensor width / (2 X focal length)) * (180/π)

Field of view = 2 (Tan (Angle of view/2) X Distance to Subject)

Just remember these 2 lines as you reach into your camera bag for a different lens.

https://shuttermuse.com/angle-of-view-vs-field-of-view-fov-aov/



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bleirer

Good article.

rikhar Loc: Ct. shoreline

After reading all the responses that I received.I've concluded that my original thoughts were correct. It is the size of the sensor in the camera that is relevant to the angle of view It is not the DX/FX designation on the lens. (I guess that means that size really does matter.) Also, I was surprised to see that there are many photographers in this forum who don't seem to understand the difference between Focal Length and ANGLE OF VIEW or the effect of each. Thanks again and I hope I didn't ruffle anyone's feathers.
Rick